A really old term from the 90's meaning to dance with style. Why are you looking this up.

Guy 1: "Deathy was Getting jiggy with it last night at the dance."
Guy 2: "Haha what? Really?"
Guy 1: "Yeah, she's bringing that phrase back too, she's the only one who can."
Guy 2: "Cool, soon we'll all be getting jiggy with it."